Zum letzten Kliff is a German remake of Fawlty Towers. 11 of the 12 original episodes were remade by RTL (series 1 finale "The Germans" remaining unadapted due to its mocking of German people and frequent references to World War II). It was the only remake to consult John Cleese, the writer and title role of the original series. Apart from the pilot, no other episode was ever aired and it's reported that John Cleese made a cameo in one of the unaired episodes.
More info
